CVE-2025-36557: big-ip analytics Buffer Overflow — Fix

Description

When an HTTP profile with the Enforce RFC Compliance option is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-120 CWE-120

Affected Products

Vendor	Product	Versions
f5	big-ip_access_policy_manager	16.1.0 — 16.1.5
f5	big-ip_access_policy_manager	17.1.0 — 17.1.2
f5	big-ip_advanced_firewall_manager	16.1.0 — 16.1.5
f5	big-ip_advanced_firewall_manager	17.1.0 — 17.1.2
f5	big-ip_analytics	16.1.0 — 16.1.5
f5	big-ip_analytics	17.1.0 — 17.1.2
f5	big-ip_application_acceleration_manager	16.1.0 — 16.1.5
f5	big-ip_application_acceleration_manager	17.1.0 — 17.1.2
f5	big-ip_application_security_manager	16.1.0 — 16.1.5
f5	big-ip_application_security_manager	17.1.0 — 17.1.2
f5	big-ip_domain_name_system	16.1.0 — 16.1.5
f5	big-ip_domain_name_system	17.1.0 — 17.1.2
f5	big-ip_fraud_protection_service	16.1.0 — 16.1.5
f5	big-ip_fraud_protection_service	17.1.0 — 17.1.2
f5	big-ip_global_traffic_manager	16.1.0 — 16.1.5
f5	big-ip_global_traffic_manager	17.1.0 — 17.1.2
f5	big-ip_link_controller	16.1.0 — 16.1.5
f5	big-ip_link_controller	17.1.0 — 17.1.2
f5	big-ip_local_traffic_manager	16.1.0 — 16.1.5
f5	big-ip_local_traffic_manager	17.1.0 — 17.1.2
f5	big-ip_policy_enforcement_manager	16.1.0 — 16.1.5
f5	big-ip_policy_enforcement_manager	17.1.0 — 17.1.2
f5	big-ip_next_cloud-native_network_functions	1.1.0 — 1.4.0
f5	big-ip_next_service_proxy_for_kubernetes	1.7.0 — 1.7.9
f5	big-ip_next_service_proxy_for_kubernetes	1.8.0 — 1.9.2

References

Advisories & Patches

https://my.f5.com/manage/s/article/K000139571

Frequently Asked Questions

What is CVE-2025-36557? +

When an HTTP profile with the Enforce RFC Compliance option is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-36557? +

CVE-2025-36557 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-36557? +

CVE-2025-36557 affects products from f5, specifically: big-ip_access_policy_manager, big-ip_advanced_firewall_manager, big-ip_analytics, big-ip_application_acceleration_manager, big-ip_application_security_manager, big-ip_domain_name_system, big-ip_fraud_protection_service, big-ip_global_traffic_manager, big-ip_link_controller, big-ip_local_traffic_manager, big-ip_next_cloud-native_network_functions, big-ip_next_service_proxy_for_kubernetes, big-ip_policy_enforcement_manager. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-36557? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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